share/mk: Don't install only differing in case files on case insensitive fs

MacOS has case insensitive filesystems by default. So trying to link
between foo.X and FOO.X causes an error of some sort since we unlink the
old foo file destroying the newly installed foo due to the insensitive
nature of the FS. Assume that this is true on darwin/macos, though it is
only try by default there.

Perhaps install should grow smarts to know when this is the case, though
that looked much trickier. There didn't seem to be a flag to check. This
would be better, imho, since we could still write the METALOG data
correctly (images created from these metalogs are imperfect due to this
relatively issue...).

Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D44347

pkgbase: put library links and symlinks in the -dev package

Some libraries (e.g. ncurses) install links to the main library for
backwards compatibilty. This change ensures that those links are in the
dev package since the files being linked to are in that package.

PR: 249143
MFC after: 1 week
Reviewed by: emaste, manu
Differential Revision: https://reviews.freebsd.org/D41841

Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Reapply r295227: Stop hiding link install commands.

This was lost in the release-pkg merge in r298107.

Sponsored by: Dell EMC Isilon

Re-remove excess / for installing SYMLINKS

This excess / was introduced in r280129, and fixed in r295230, but got
re-introduced while merging another branch in r298107.

Approved by: gjb
Differential Revision: https://reviews.freebsd.org/D11995

Fix style and remove excess / for installing SYMLINKS.

Sponsored by: EMC / Isilon Storage Division

Stop hiding link install commands.

This is no longer needed now that a .for loop is used rather
than inline shell script.

Sponsored by: EMC / Isilon Storage Division

Fix DESTDIR support

Symplify links installation by using multi variable for loop

Using multi variable for loop not only simplify the code, it also ensures that
the LINKS and SYMLINKS input have the right number of words

Differential Revision: https://reviews.freebsd.org/D2069
Reviewed by: imp

Makes it more flexible to tag and define a target package

Tag the metalog with a global default sets of tags that will be used to decide
what will go in which package, more finer grain tagging to come

Replace all known uses of ln in the build process with appropriate
install -l invocations via new INSTALL_LINK and INSTALL_SYMLINK
variables.

Sponsored by: DARPA, AFRL
Reviewed by: ian, ray, rpaulo

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

- Import the HEAD csup code which is the basis for the cvsmode work.

Try really hard to fix parallel installs. Add a bunch of .ORDER
directives to ensure that all realinstall sub-tasks are executed
after beforeinstall, similarly ensure that all afterinstall sub-
tasks are executed after realinstall. Demonstration:

all: task1 task2
.ORDER: task1 task2

task2: task2_subtask
.ORDER: task1 task2_subtask

task1 task2 task2_subtask:
@sleep `jot -r 1 0 1.0`
@echo ${.TARGET}

Without the second .ORDER directive, task2_subtask can be run in
parallel with task1.

Spotted by: Andrea Campi <andrea@webcom.it>

Handle installation of hard and symbolic links via a seperate .mk file.